#region Licence
// Copyright (c) 2008 James Gregory (james@jagregory.com)
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
// 
//     * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//     * Neither the name of James Gregory nor the names of its
//     contributors may be used to endorse or promote products derived from this
//     software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#endregion

using System;
using System.Collections.Generic;
using Boo.Lang.Compiler.TypeSystem;
using JAGregory.BooPlugin.Language.Reflection;

namespace JAGregory.BooPlugin.Language.Members
{
    public class MemberDeclaration
    {
        private readonly IEntity entity;
        private readonly List<MemberSignature> signatures = new List<MemberSignature>();

        public MemberDeclaration(IEntity entity)
        {
            this.entity = entity;
        }

        public List<MemberSignature> Signatures
        {
            get { return signatures; }
        }

        public string Name
        {
            get { return entity.Name; }
        }

        public string FullName
        {
            get { return entity.FullName; }
        }

        public EntityType MemberType
        {
            get { return entity.EntityType; }
        }

        public string Description
        {
            get
            {
                string name = FullName;
                string type = "unknown";

                if (entity.EntityType == EntityType.Method)
                {
                    if (Signatures.Count == 0)
                        name += "()";
                    else
                    {
                        name += "(";
                        MemberSignature sig = Signatures[0];
                        foreach (string param in sig.Parameters)
                        {
                            name += param + ", ";
                        }
                        name = name.Trim();
                        name = name.TrimEnd(',');
                        name += ")";
                    }
                }

                IMethod method = entity as IMethod ??
                                 ((entity is IProperty) ? ((IProperty)entity).GetGetMethod() : null);

                if (method != null)
                    type = method.ReturnType.ToString();

                return string.Format("{0} {1}", type, name);
            }
        }

        public virtual IntellisenseIcon Icon
        {
            get { return IntellisenseIcon.Class; }
        }

        /// <summary>
        /// Creates a MemberDeclaration based on an IEntity, returning a subclass specific to the EntityType
        /// if available.
        /// </summary>
        public static MemberDeclaration FromEntity(IEntity entity)
        {
            MemberDeclarationReflectionCache cache = new MemberDeclarationReflectionCache();

            Type declarationType = cache.FindMemberDeclarationType(entity.EntityType);

            if (declarationType == null)
                return new MemberDeclaration(entity);

            return (MemberDeclaration)Activator.CreateInstance(declarationType, entity);
        }
    }
}